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SMCJ15C Transient Voltage Suppressor Diode - Equivalent & Substitute Parts
Part Overview
The SMCJ15C is a bidirectional Zener transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 15V reverse standoff voltage with a 25.62V maximum clamping voltage at peak pulse current of 61.5A, housed in a DO-214AB (SMC) package. The SMCJ15C is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer Part Number | SMCJ15C | — |
| Manufacturer | Littelfuse Inc. | — |
| Category | Transient Voltage Suppressors (TVS) | — |
| Type | Zener | — |
| Voltage - Reverse Standoff (Typ) | 15 | V |
| Voltage - Breakdown (Min) | 15.84 | V |
| Voltage - Clamping (Max) @ Ipp | 25.62 | V |
| Current - Peak Pulse (10/1000µs) | 61.5 | A |
| Power - Peak Pulse | 1500 | W |
| Bidirectional Channels | 1 | — |
| Operating Temperature Range | -55 to 150 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AB, SMC | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
| Product Status | Obsolete | — |
Substitute Part Grouping Explanation
Substitution of the SMCJ15C is determined by strict alignment of the following electrical and mechanical parameters:
Critical Substitution Parameters:
- Voltage - Reverse Standoff (Typ): 15V
- Voltage - Clamping (Max) @ Ipp: 24.4V to 26.9V (within acceptable tolerance range)
- Current - Peak Pulse (10/1000µs): 55.8A to 123A (equal or greater capacity)
- Power - Peak Pulse: 1500W to 3000W (equal or greater capacity)
- Bidirectional Channels: 1
- Package / Case: DO-214AB, SMC
- Mounting Type: Surface Mount
- Operating Temperature: -55°C minimum to 150°C maximum
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: 1 (Unlimited)
All substitute parts listed maintain the same reverse standoff voltage (15V) and operate within compatible clamping voltage ranges. Peak pulse current and power ratings are equal to or exceed the original specification, ensuring equivalent or superior transient suppression capability. All substitutes are housed in the same DO-214AB (SMC) surface-mount package and maintain full RoHS3 compliance with MSL-1 moisture sensitivity rating.
Parameter Comparison
| Part Number | Manufacturer | Vwm (V) | Vc (Max) @ Ipp (V) | Ipp (A) | Power (W) | Temp Range (°C) | Package | Status |
|---|---|---|---|---|---|---|---|---|
| SMCJ15C | Littelfuse Inc. | 15 | 25.62 | 61.5 | 1500 | -55 to 150 | DO-214AB (SMC) | Obsolete |
| SMCJ15CA | EVVO Semi | 15 | 24.4 | 61.5 | 1500 | -55 to 150 | DO-214AB (SMC) | Active |
| SMCJ15CA-13-F | Diodes Incorporated | 15 | 24.4 | 61.5 | 1500 | -55 to 150 | DO-214AB (SMC) | Active |
| SMCJ15CA-M3/57T | Vishay General Semiconductor - Diodes Division | 15 | 24.4 | 61.5 | 1500 | -55 to 150 | DO-214AB (SMC) | Active |
| SMCJ15CA-M3/9AT | Vishay General Semiconductor - Diodes Division | 15 | 24.4 | 61.5 | 1500 | -55 to 150 | DO-214AB (SMC) | Active |
| SMCJ15CE3/TR13 | Microchip Technology | 15 | 26.9 | 55.8 | 1500 | -65 to 150 | DO-214AB (SMC) | Active |
| SMLJ15CA | Bourns Inc. | 15 | 24.4 | 123 | 3000 | -55 to 150 | DO-214AB (SMC) | Active |
| SMLJ15CA-TP | Micro Commercial Co | 15 | 24.4 | 123 | 3000 | -55 to 175 | DO-214AB (SMC) | Active |
| TV15C150JB-G | Comchip Technology | 15 | 24.4 | 61.48 | 1500 | -55 to 150 | DO-214AB (SMC) | Active |
Engineering Selection Recommendations
Primary Substitutes (Electrical and Mechanical Equivalence):
SMCJ15CA (EVVO Semi), SMCJ15CA-13-F (Diodes Incorporated), SMCJ15CA-M3/57T (Vishay), and SMCJ15CA-M3/9AT (Vishay) provide direct electrical equivalence to the SMCJ15C with identical peak pulse current (61.5A) and power dissipation (1500W). These parts are active products with full RoHS3 compliance and MSL-1 rating. Clamping voltage tolerance (24.4V) is within acceptable operating margins. Packaging and mounting specifications are identical.
Enhanced Performance Substitutes (Higher Current/Power Rating):
SMLJ15CA (Bourns Inc.) and SMLJ15CA-TP (Micro Commercial Co) offer doubled peak pulse current (123A) and power dissipation (3000W) while maintaining the same 15V reverse standoff voltage and 24.4V clamping voltage. These parts provide superior transient suppression capability and are suitable for applications requiring higher energy absorption. SMLJ15CA-TP extends the operating temperature range to 175°C.
Alternative Substitute (Extended Temperature Range):
SMCJ15CE3/TR13 (Microchip Technology) maintains electrical equivalence with a slightly elevated clamping voltage (26.9V) and reduced peak pulse current (55.8A). This part offers an extended lower operating temperature limit (-65°C) and is suitable for applications requiring enhanced cold-temperature performance.
Compliance and Availability:
All substitute parts maintain ROHS3 compliance and MSL-1 moisture sensitivity rating. Active product status ensures ongoing availability and manufacturer support. Selection should be based on application-specific requirements for current capacity, power dissipation, and operating temperature range.
Frequently Asked Questions (FAQ)
Q: Can SMCJ15CA directly replace SMCJ15C in existing designs?
A: Yes. SMCJ15CA provides direct electrical and mechanical substitution with identical reverse standoff voltage (15V), peak pulse current (61.5A), power dissipation (1500W), and DO-214AB (SMC) package. Clamping voltage tolerance (24.4V vs. 25.62V) remains within acceptable operating margins for general-purpose transient suppression applications.
Q: What is the difference between SMCJ15CA and SMLJ15CA?
A: Both maintain the same 15V reverse standoff voltage and 24.4V clamping voltage. The primary difference is peak pulse current and power dissipation: SMCJ15CA handles 61.5A at 1500W, while SMLJ15CA handles 123A at 3000W. SMLJ15CA is suitable for applications requiring higher energy absorption capability.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL-1 moisture sensitivity rating, meeting current environmental and reliability standards.
Q: Does package compatibility affect substitution?
A: No. All substitute parts use the DO-214AB (SMC) surface-mount package, ensuring identical PCB footprint and assembly compatibility with the original SMCJ15C design.
Q: Which substitute offers the widest operating temperature range?
A: SMLJ15CA-TP (Micro Commercial Co) extends the upper operating temperature limit to 175°C, compared to 150°C for most other substitutes. SMCJ15CE3/TR13 (Microchip Technology) extends the lower limit to -65°C.
Q: Can I use a substitute with higher peak pulse current in place of SMCJ15C?
A: Yes. Substitutes with equal or greater peak pulse current and power dissipation (such as SMLJ15CA at 123A / 3000W) provide equivalent or superior transient suppression. The higher current rating does not degrade performance in applications designed for the original 61.5A specification.
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